4-13
4. Troubleshooting
4-1-6. No Video (Tuner DTV)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the DTV source.
Check the Tuner, Check the Chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check the D-TV source.
No
Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 Pin of Tuner?
Power indicator LED is off.
Lamp(Backlight) on, no video
No
Check the connection of RF cable
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
Yes
Check IC201 (Saturn4)
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
No
No
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Check the ‘signal strength’
in Self Diagnosis menu
Strength is enough?
No
Please, Contact Tech support
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Yes
Yes
Input the RF cable properly.
Yes
Yes
2
Check a set
in the ‘Stand-by mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LN32B550K1F
Страница 171: ...4 3 4 Troubleshooting BD102 BD108 BD106 BD106 R102 R171 R173 C122 R527 Pin 1 5 F1 ...
Страница 173: ...4 5 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 PCR PCG PCB PCH PCV ...
Страница 174: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 176: ...4 8 4 Troubleshooting Pin 7 Pin 12 Pin 19 Pin 20 Pin 34 Pin 35 Pin 7 Pin 12 ...
Страница 177: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 179: ...4 11 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 Pin 8 Pin 2 Pin 4 ...
Страница 180: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 182: ...4 14 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 Pin 2 Pin 4 ...
Страница 183: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 185: ...4 17 4 Troubleshooting R408 Pin 19 Pin 20 Pin 34 Pin 35 TP V2CVBS ...
Страница 186: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 188: ...4 20 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 R725 R728 R727 R703 R702 R704 ...
Страница 189: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 191: ...4 23 4 Troubleshooting C180 C177 C179 C178 R749 R748 C133 R416 C112 R740 R741 TP V2SR V2SL R745 R744 R712 R713 ...
Страница 192: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Страница 212: ...6 6 6 Wiring Diagram Memo ...